Karteikarten
Matter
Karten in diesem Stapel (10)
- 1What are the linear particles in an atom called?Sub-atomic particles.
- 2What are isotopes?Isotopes are atoms with the same number of protons but a different number of neutrons.
- 3Which physicist and their students discovered the nucleus of an atom?Ernest Rutherford.
- 4How are atoms perceived as to be like before the discovery of the nucleus?Before the nucleus was discovered scientists thought the atom was like a plum pudding.
- 5What is the atomic number of an atom equal to?The atomic number in an atom is equal to the number of protons and electrons.
- 6What is the mass number of an atom equal to?The mass number in an atom is equal to the total number of protons and neutrons.
- 7What does an atom become when an electron is added or removed from it's outer shell?A charged ion.
- 8“When ions have the same type of charge they _____ each other, whereas oppositely charged ions _______.”“When ions have the same type of charge they attract each other, whereas oppositely charged ions attract.”
- 9What is the difference between an isotope and an element?The atomic mass.
- 10Why is it that isotopes have a different atomic mass number but are of the same element?Isotopes are atoms with the same number of protons but a different number of neutrons and though neutrons have no charge, they have an impact on the atomic mass of an atom, making it a different version of itself.